Figure 3
From: Modularization of biochemical networks based on classification of Petri net t-invariants
Pheromone response pathway in yeast: the Petri net model. Tables listing the meaning of the places and transitions are given as additional material [see Additional file 3]. The t-invariants are graphically represented using the color code of the respective t-clusters (see Figures 4 and 5). Transitions, which are only included in some of the t-invariants of a given t-cluster, are marked by colored numbers. These numbers correspond to the ID of those t-invariants in which the transition is included. The transitions characterizing a given t-cluster (i.e. those transitions that participate exactly in all t-invariants of the t-cluster) are framed in the color of the respective t-cluster, and the biological meaning of each of these transition sets is denoted.